Entomology for beginners. Entomology is the study of insects. This page provides some basic information on insects. First we look at the anatomy of adult insects, and then we will see a short story about the metamorphosis of insects. Insect anatomy.
The range rule tells us that the standard deviation of a sample is approximately equal to one fourth of the range of the data. In other words s = (Maximum â Minimum)/4. This is a very straightforward formula to use, and should only be used as a very rough estimate of the standard deviation.
Calculate the Population Standard Deviation. 1  Calculate the mean or average of each data set. 2  Subtract the deviance of each piece of data by subtracting the mean from each number. 3  Square each of the deviations.  Add up all of the squared 1  deviations. Divide this value by the number of items in the data  set.